US20220285112A1 - Membrane pressure switch - Google Patents
Membrane pressure switch Download PDFInfo
- Publication number
- US20220285112A1 US20220285112A1 US17/637,394 US202017637394A US2022285112A1 US 20220285112 A1 US20220285112 A1 US 20220285112A1 US 202017637394 A US202017637394 A US 202017637394A US 2022285112 A1 US2022285112 A1 US 2022285112A1
- Authority
- US
- United States
- Prior art keywords
- housing
- pressure switch
- membrane
- fixing disk
- microswitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 42
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 6
- 238000004382 potting Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- IWZSHWBGHQBIML-ZGGLMWTQSA-N (3S,8S,10R,13S,14S,17S)-17-isoquinolin-7-yl-N,N,10,13-tetramethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-amine Chemical compound CN(C)[C@H]1CC[C@]2(C)C3CC[C@@]4(C)[C@@H](CC[C@@H]4c4ccc5ccncc5c4)[C@@H]3CC=C2C1 IWZSHWBGHQBIML-ZGGLMWTQSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229940125810 compound 20 Drugs 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- JAXFJECJQZDFJS-XHEPKHHKSA-N gtpl8555 Chemical compound OC(=O)C[C@H](N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@@H]1C(=O)N[C@H](B1O[C@@]2(C)[C@H]3C[C@H](C3(C)C)C[C@H]2O1)CCC1=CC=C(F)C=C1 JAXFJECJQZDFJS-XHEPKHHKSA-N 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
- H01H35/2628—Means for adjustment of "ON" or "OFF" operating pressure by varying the relative position of switch-casing and pressure sensitive element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
Definitions
- the invention relates to a membrane pressure switch according to the preamble of claim 1 .
- Such a membrane pressure switch is known from DE 201 06 436 U1.
- This pressure switch comprises an insulating housing, which is provided at the end surface with at least two essentially axially parallel, radially elastic anchor tongues with gripper hooks, which engage a ring surface of a hexagonal nut.
- a membrane pressure switch is developed according to the invention, which is provided with a housing, in which a deformable membrane is arranged. Furthermore, a mushroom shaped thrust element is provided in the housing, which is movable by deformation of the membrane and for this purpose abuts against the membrane. If pressure is applied to the membrane, for example by a pressurized fluid, the membrane deforms and presses on the mushroom shaped thrust element, so that the latter can be moved along the longitudinal axis of the housing from a standby position to a switching position.
- the mushroom shaped thrust element actuates a switching operation of a microswitch, which is arranged opposite the mushroom shaped thrust element by means of a fixing disk in the housing.
- the fixing disk is provided with an external thread, which is screwed into an internal thread of the housing in the mounted state of the fixing disk.
- FIG. 1 shows a front view of a membrane pressure switch according to the invention
- FIG. 2 shows a sectional view of the membrane pressure switch along line A-A in FIG. 1 ,
- FIG. 3 shows a sectional view of the membrane pressure switch according to FIG. 1 along the line B-B in FIG. 1 , and
- FIG. 4 shows a perspective view of the membrane pressure switch according to the invention.
- FIG. 1 shows a front view of a membrane pressure switch 1 according to the invention and illustrates the section lines A-A and B-B, resulting in the sectional views of FIGS. 2 and 3 .
- the membrane pressure switch 1 comprises a housing 2 , in which a membrane 3 is arranged, which can be fixed in the housing 2 by means of an adjusting washer 9 arranged on the membrane 3 .
- the membrane 3 is deformable, such as by a fluid introduced into a pressure chamber 23 , for which purpose the adjusting washer 9 comprises a preferably centric recess 10 .
- a mushroom shaped thrust element 4 is further arranged in the housing 2 , which comprises an abutment disk 4 A and a plunger 4 B attached to the abutment disk 4 A.
- the mushroom shaped thrust element 4 abuts the membrane 3 with its abutment disk 4 A and can move along a movement path indicated by the double arrow VW in FIG. 2 in the direction of an actuating element 22 of a microswitch 5 , which is arranged and fixed opposite to the mushroom shaped thrust element by means of a fixing disk 6 in the housing 2 .
- the fixing disk 6 is provided with an external thread 7 , which can cooperate with an internal thread 8 of the housing 2 , so that the fixing disk 6 and the microswitch 5 arranged thereon are screwed into the housing 2 in the mounted state.
- the microswitch 5 is sealingly glued to the fixing disk 6 .
- an end stop 11 for the mushroom shaped thrust element 4 is provided in the housing 2 , which limits the movement path VW thereby, that in the end position the abutment disk 4 A is arranged on the stop 11 .
- the microswitch 5 is connected to a printed circuit board 12 , which is also arranged in the housing 2 .
- FIG. 2 shows that a tube 17 is plugged onto a free end portion 18 of the housing 2 on the side of the microswitch 5 , wherein in the final mounted state shown in FIG. 2 a connecting cable 21 is soldered onto the printed circuit board 12 and two potting compounds 19 and 20 are filled into the tube 17 .
- the potting compound 19 here is a viscous plastic compound, so that it can be prevented that this potting compound 19 can penetrate into the threads 7 and 8 , which are screwed together.
- the second potting compound 20 is a plastic compound suitable for UL-certification.
- FIG. 3 shows that a counter screw 13 is also screwed through the printed circuit board 12 into an internal thread 14 of the fixing disk 6 .
- the counter screw 13 is supported with its front end surface 15 on a bottom surface 16 of the housing 2 . This results in a jamming of the external thread 7 relative to the internal thread 8 , which determines the position of the fixing disk 6 and thereby of the microswitch 5 in the housing 2 .
- the present invention further relates to a method for adjusting a switching point of a membrane pressure switch.
- This process comprises the following method steps:
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
Description
- The invention relates to a membrane pressure switch according to the preamble of claim 1.
- Such a membrane pressure switch is known from DE 201 06 436 U1. This pressure switch comprises an insulating housing, which is provided at the end surface with at least two essentially axially parallel, radially elastic anchor tongues with gripper hooks, which engage a ring surface of a hexagonal nut.
- In contrast, it is the purpose of the present invention to develop a typical membrane pressure switch, the design of which is technically simpler.
- This solution for this purpose is provided by the features of claim 1.
- In detail, a membrane pressure switch is developed according to the invention, which is provided with a housing, in which a deformable membrane is arranged. Furthermore, a mushroom shaped thrust element is provided in the housing, which is movable by deformation of the membrane and for this purpose abuts against the membrane. If pressure is applied to the membrane, for example by a pressurized fluid, the membrane deforms and presses on the mushroom shaped thrust element, so that the latter can be moved along the longitudinal axis of the housing from a standby position to a switching position.
- In this switching position, the mushroom shaped thrust element actuates a switching operation of a microswitch, which is arranged opposite the mushroom shaped thrust element by means of a fixing disk in the housing.
- According to the invention, the fixing disk is provided with an external thread, which is screwed into an internal thread of the housing in the mounted state of the fixing disk.
- Compared with known pressure switches, such as the typical pressure switch in particular, results in the advantage of a smaller number of parts and a considerable simplification of assembly.
- These further results in the advantage that the typical membrane pressure switch according to the invention can be manufactured at lower cost and is easy to operate.
- The dependent claims contain further advantageous embodiments of the invention.
- Further details, advantages and features of the present invention will be apparent in the following description of an embodiment based on the drawing.
-
FIG. 1 shows a front view of a membrane pressure switch according to the invention, -
FIG. 2 shows a sectional view of the membrane pressure switch along line A-A inFIG. 1 , -
FIG. 3 shows a sectional view of the membrane pressure switch according toFIG. 1 along the line B-B inFIG. 1 , and -
FIG. 4 shows a perspective view of the membrane pressure switch according to the invention. -
FIG. 1 shows a front view of a membrane pressure switch 1 according to the invention and illustrates the section lines A-A and B-B, resulting in the sectional views ofFIGS. 2 and 3 . - From a combined view of
FIGS. 1 to 3 , it is clear that the membrane pressure switch 1 comprises ahousing 2, in which amembrane 3 is arranged, which can be fixed in thehousing 2 by means of an adjustingwasher 9 arranged on themembrane 3. - The
membrane 3 is deformable, such as by a fluid introduced into apressure chamber 23, for which purpose the adjustingwasher 9 comprises a preferablycentric recess 10. - As shown in
FIG. 2 , a mushroom shapedthrust element 4 is further arranged in thehousing 2, which comprises anabutment disk 4A and a plunger 4B attached to theabutment disk 4A. The mushroom shapedthrust element 4 abuts themembrane 3 with itsabutment disk 4A and can move along a movement path indicated by the double arrow VW inFIG. 2 in the direction of an actuatingelement 22 of amicroswitch 5, which is arranged and fixed opposite to the mushroom shaped thrust element by means of afixing disk 6 in thehousing 2. - The
fixing disk 6 is provided with anexternal thread 7, which can cooperate with aninternal thread 8 of thehousing 2, so that thefixing disk 6 and themicroswitch 5 arranged thereon are screwed into thehousing 2 in the mounted state. - Preferably, the
microswitch 5 is sealingly glued to thefixing disk 6. - As further shown in
FIG. 2 , anend stop 11 for the mushroom shapedthrust element 4 is provided in thehousing 2, which limits the movement path VW thereby, that in the end position theabutment disk 4A is arranged on thestop 11. - As further shown in
FIG. 2 , themicroswitch 5 is connected to a printedcircuit board 12, which is also arranged in thehousing 2. - Finally,
FIG. 2 shows that atube 17 is plugged onto afree end portion 18 of thehousing 2 on the side of themicroswitch 5, wherein in the final mounted state shown inFIG. 2 a connectingcable 21 is soldered onto the printedcircuit board 12 and twopotting compounds tube 17. Thepotting compound 19 here is a viscous plastic compound, so that it can be prevented that thispotting compound 19 can penetrate into thethreads - The
second potting compound 20 is a plastic compound suitable for UL-certification. -
FIG. 3 shows that acounter screw 13 is also screwed through the printedcircuit board 12 into aninternal thread 14 of thefixing disk 6. In this screwed-in state, thecounter screw 13 is supported with itsfront end surface 15 on abottom surface 16 of thehousing 2. This results in a jamming of theexternal thread 7 relative to theinternal thread 8, which determines the position of thefixing disk 6 and thereby of themicroswitch 5 in thehousing 2. - In addition to the membrane pressure switch 1 described above, shown in perspective view in the final mounted state in
FIG. 4 , the present invention further relates to a method for adjusting a switching point of a membrane pressure switch. - This process comprises the following method steps:
-
- Applying pressure in the
pressure chamber 23 of thehousing 2, which causes deformation of themembrane 3 and movement of the mushroom shapedthrust element 4 in the direction of theend stop 11. - In the next method step, the
fixing disk 6 with themicroswitch 5 fixed on it is screwed into thehousing 2, until themicroswitch 5 is switched by the mushroom shapedthrust element 4. - Preferably, this switching of the
microswitch 5 can be indicated on a suitable assembly tool. - In the final assembly step, the
counter screw 13 is screwed through the printedcircuit board 12 into theinternal thread 14 of thefixing screw 6, until theend surface 15 is supported on thebottom surface 16 of thehousing 2. As previously described, this results in a jamming of theinternal thread 8 of thehousing 6 relative to theexternal thread 7 of thefixing disk 6, thereby fixing thefixing disk 6 and consequently fixing the switching point of the microswitch.
- Applying pressure in the
- In addition to the foregoing written description of the invention, explicit reference is hereby made to the graphical representation of the invention in
FIGS. 1 to 4 for supplementary disclosure thereof. -
- 1 membrane pressure switch
- 2 housing
- 3 membrane
- 4 mushroom shaped thrust element
- 4 a abutment disk
- 4 b plunger
- 5 microswitch
- 6 fixing disk
- 7 external thread
- 8 internal thread
- 9 adjusting washer
- 10 centric recess
- 11 end stop/stop
- 12 printed circuit board
- 13 counter screw
- 14 internal thread
- 15 front surface
- 16 bottom surface
- 17 tube
- 18 end portion
- 19, 20 potting compounds
- 21 connecting cable
- 22 switching pin/actuating element
- 23 pressure chamber
- vw movement of the mushroom shaped
thrust element 4
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019212681.2A DE102019212681B4 (en) | 2019-08-23 | 2019-08-23 | Membrane pressure switch and method for setting a switching point of a membrane pressure switch |
DE102019212681.2 | 2019-08-23 | ||
PCT/EP2020/073328 WO2021037665A1 (en) | 2019-08-23 | 2020-08-20 | Membrane pressure switch |
Publications (2)
Publication Number | Publication Date |
---|---|
US20220285112A1 true US20220285112A1 (en) | 2022-09-08 |
US11823853B2 US11823853B2 (en) | 2023-11-21 |
Family
ID=72470319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/637,394 Active US11823853B2 (en) | 2019-08-23 | 2020-08-20 | Membrane pressure switch |
Country Status (4)
Country | Link |
---|---|
US (1) | US11823853B2 (en) |
EP (1) | EP4018467B1 (en) |
DE (1) | DE102019212681B4 (en) |
WO (1) | WO2021037665A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4616114A (en) * | 1984-11-19 | 1986-10-07 | Texas Instruments Incorporated | Pressure responsive switch having little or no differential between actuation release pressure levels |
US4827095A (en) * | 1988-04-12 | 1989-05-02 | Dwyer Instruments, Inc. | Differential pressure switch assembly with high static pressure use characteristics |
US4900883A (en) * | 1988-06-14 | 1990-02-13 | Whitman Controls Corporation | Fluid-operated compound switch |
US7112753B1 (en) * | 2005-08-29 | 2006-09-26 | Paul-Chia Lee | Pressure switch |
US8653387B2 (en) * | 2010-07-07 | 2014-02-18 | Ashcroft, Inc. | Rotary adjustment for dual switch assembly |
US10510504B2 (en) * | 2017-12-08 | 2019-12-17 | Eagle Technology, Llc | Force amplified low pressure depth activated switch |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1148623B (en) * | 1957-07-05 | 1963-05-16 | Pleuger & Co | Submersible switches that switch depending on a liquid level to control pumps driven by an electric motor |
GB1278778A (en) | 1968-08-19 | 1972-06-21 | Simplifix Couplings Ltd | Improvements in pressure actuated switches |
IT1252296B (en) * | 1991-11-15 | 1995-06-08 | Ma Ter Srl | OVERFLOW PRESSURE SWITCH, WITH MANUAL RESET SAFETY MICROSWITCH |
DE19701584C2 (en) * | 1997-01-17 | 2000-02-03 | Manfred Heckner | Switches, in particular safety switches |
DE20106436U1 (en) * | 2001-04-12 | 2001-06-28 | Quitoschinger Willi | Pressure switch with connector |
WO2005100792A1 (en) * | 2004-04-14 | 2005-10-27 | Gilberto Tadeu Pires De Paula | Pressure and flow controller for a pump |
-
2019
- 2019-08-23 DE DE102019212681.2A patent/DE102019212681B4/en active Active
-
2020
- 2020-08-20 US US17/637,394 patent/US11823853B2/en active Active
- 2020-08-20 EP EP20771208.4A patent/EP4018467B1/en active Active
- 2020-08-20 WO PCT/EP2020/073328 patent/WO2021037665A1/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4616114A (en) * | 1984-11-19 | 1986-10-07 | Texas Instruments Incorporated | Pressure responsive switch having little or no differential between actuation release pressure levels |
US4827095A (en) * | 1988-04-12 | 1989-05-02 | Dwyer Instruments, Inc. | Differential pressure switch assembly with high static pressure use characteristics |
US4900883A (en) * | 1988-06-14 | 1990-02-13 | Whitman Controls Corporation | Fluid-operated compound switch |
US7112753B1 (en) * | 2005-08-29 | 2006-09-26 | Paul-Chia Lee | Pressure switch |
US8653387B2 (en) * | 2010-07-07 | 2014-02-18 | Ashcroft, Inc. | Rotary adjustment for dual switch assembly |
US10510504B2 (en) * | 2017-12-08 | 2019-12-17 | Eagle Technology, Llc | Force amplified low pressure depth activated switch |
Also Published As
Publication number | Publication date |
---|---|
EP4018467A1 (en) | 2022-06-29 |
DE102019212681B4 (en) | 2021-03-25 |
DE102019212681A1 (en) | 2021-02-25 |
WO2021037665A1 (en) | 2021-03-04 |
US11823853B2 (en) | 2023-11-21 |
EP4018467B1 (en) | 2024-07-03 |
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